cho A la mot so co hai chu so ,B la tong cac chu so cua A .C la tong cac chua so cua B .tim A biet A=B+C+44

cho 3 chu so a b c khac nhau va khac 0 . Tinh tong cua cac so co 2 chu so khac nhau lap duoc  tu cac chu so biet a+b+c=8

Tim so tu nhien co 2 chu so biet rang

a. So do gap 6 lan tong cac chu so cua no

b. So do gap 7 lan tong cac chu so cua no

c. So do gap 8 lan tong cac chu so cua no

d. So do gap 9 lan tong cac chu so cua no

Bai 1 : Cho 3 chu so a ;b ;c thoa man  0< a < b < c. Goi A la tap hop cac so tu nhien co 3 chu so moi so gom ca 3 chu so a, b , c .Biet rang tong cua 2 so nho nhat trg tap hop A =488. Khi do a+b+c=

Bai 2 : Chia cac so tu nhien tu 1 den 100 thanh 2 lop : lop so chan va lop so le .Nhu vay tong cac chu so cua 2 lop hon kem  nhau bao nhieu don vi

Cho 3 chu so a b c khac nhau va khac 0.biet a + b + c bang 8. Tinh tong cac chu so co 2 chu so khac nhau duoc lap tu 3 chu so da cho

Co ba chu so abc khac nhau va khac 0. Lap cac so co 2 chu so .Tinh tong cac so co hai chu so da lap biet a+b+c=8

cho 3 chu so a,b,c khac 0 ;a>b>c

a,lap duoc bao nhieu so co 3 chu so ?[trong cac so tren ko so nao duoc lap lai 2 lan]

b,biet tong cua tat ca cac so vua lap 3330.hieu cua so lon nhat va so be nhat trong cac so do la 594 tim 3 chu so a,b,c

Cho 3 chu so a b c khac nhau va khac 0.biet a + b + c bang 8. Tinh tong cac chu so co 2 chu so khac nhau duoc lap tu 3 chu so da cho

cho 3  chu so a,b,c thoa man 0<a<b<c . goi a la tap hop cac so co 3 chu so gom ca ba chu so a,b,c . biet rang tong cua 2 so tu nhien nho nhat trong tap hop a = 488 . khi do a + b+c =?